# HLA DP and HLA DPB LOINC Code

**URL:** <https://forum.loinc.org/t/hla-dp-and-hla-dpb-loinc-code/2283>\
**Category:** General\
**Created:** [November 29, 2024, 6:49pm UTC](https://forum.loinc.org/t/hla-dp-and-hla-dpb-loinc-code/2283 "2024-11-29T18:49:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lmonico](https://forum.loinc.org/letter_avatar_proxy/v4/letter/l/94ad74/32.png) [@lmonico](https://forum.loinc.org/u/lmonico)\
**Post date:** [November 29, 2024, 6:49pm UTC](https://forum.loinc.org/t/hla-dp-and-hla-dpb-loinc-code/2283/1 "2024-11-29T18:49:56Z")

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Canada has developed a **Canadian Organ Donation and Transplantation (CanODT) Minimum Data Set (MDS)** to standardize data collection and reporting for organ donation and transplantation. As part of ongoing efforts to enhance this dataset, some updates to the **HLA (Human Leukocyte Antigen) data element** are being evaluated.

One of the proposed changes involves refining the data element from **HLA DP** to **HLA DPB** to align more closely with specific antigen reporting. However, we were unable to identify a corresponding **LOINC code** for **HLA DPB antigens**.

**Here is the link to CanODT Transplantation MSD** : [https://www.cihi.ca/sites/default/files/document/organ-donation-transplantation-deceased-donation-minimum-data-set-manual-en.pdf](https://www.cihi.ca/sites/default/files/document/organ-donation-transplantation-deceased-donation-minimum-data-set-manual-en.pdf)  
See section 4.5.1 HLA DP for the current definition for this data element

- **HLA DPB** : The recipient’s 2 HLA DPB antigens.
- **Additional values include** :
  - 37501000087101: Human leukocyte antigen typing — No antigen identified
  - UNK: Unknown/not available/typing not done
  - OTH: Other

The LOINC code currently referenced is **HLA-DP [Type]: 12285-3**, and the value set codes are sourced from the **SNOMED CT Canadian Edition** , with additional values (UNK and OTH) from HL7.

We are reaching out to seek guidance or assistance in identifying a suitable **LOINC code** for the **HLA DPB antigen** data element.

Any advice or direction you could provide would be greatly appreciated. Thank you in advance for your expertise and support!